Remove 1.8.7 from Travis build spec
Require Ruby version >= 1.9.2 in gemspec
Remove weird 1.8.7 workarounds in features env
Don't check for >= 1.9 in Rakefile
Remove Ruby <1.9 core extensions
Remove checks for Ruby 1.8.x
Add tests in all the time that was omitted for Ruby 1.8.x
Remove File.read_with_options patch to allow 1.9 and 1.8 to behave the same
Merge pull request #1780 from mojombo/kill-1-8